Why did the emancipation proclamation score big in europe

B. Many nations had already abolish slavery

Explanation:

Because of the pressure of European bourgeoisie who led the Industrial Revolution, many European nations liberated their slaves, so that they integrated a wage labor and consumer market that the bourgeois needed at that moment. Because of this, the proclamation of emancipation was very successful in Europe. Through the proclamation of emancipation the European bourgeoisie expected an increase in the American consumer market.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

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